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Cod sursa(job #588073)
#include <cstdio>
FILE *g=fopen("combinari.in","r");
FILE *z=fopen("combinari.out","w");
using namespace std;
int n,k,st[90000];
int valid(int p)
{
int i;
for(i=1;i<p;i++)
if(st[p]<=st[i]) return 0;
return 1;
}
void afisare ()
{
for(int i=1;i<=k;i++)
fprintf(z,"%d ",st[i]);
fprintf(z,"\n");
}
void back(int niv)
{
int i;
for(i=1;i<=n;i++)
{
st[niv]=i;
if(valid(niv)==1)
{
if(niv==k)
afisare();
back(niv+1);
}
}
}
int main()
{
fscanf(g,"%d%d",&n,&k);
fclose(g);
back(1);
fclose(z);
return 0;
}